Royal Caribbean Group is doubling down on expedition cruising despite facing the hardest, most uncertain times in its history as a result of the coronavirus pandemic.

The Richard Fain-led owner of 62 ships formerly known as Royal Caribbean Cruises has bought the remaining shares of Silversea Cruises, which holds six luxury expedition vessels.

Royal Caribbean assumed a two-thirds stake in the company two years ago for $1bn.

It acquired the rest of Silversea with 5.2m shares, or about 2.5%, of company stock from Heritage Cruise Holding.